And timothy



@uitrit vfairs @anni @filtra JOHN DoYLE, or noE'oKEN; NEW JERSEY, AND 'riMoTHY A. MARTI-N,

or NEvir YORK, N. Y.

Letters Patent No. 72,001, dated December 10,1867.

IMPROVEMENT IN ROTARY PUMPS.

TO'ALL WHOM IT MAY CONCERN:

Bc it known that we, JOHN DOYLE, o f Hoboken, Hudson county, New Jersey, and TIMOTHY A. MAMnUof the city, county, and Stateof New York, have invented a new and improved Suction-or Vacuum-Pump and Blower; and that the following description, taken in connection'with the accompanying'drawings, hereinafter referred to, forms a full and exact specification of the same, wherein we have set forth Athe nature and principles of our said improvements, by whichour invention may be distinguished from all others of a similar class,l together f it, with such part-s as we cla-im, and desire to have secured to us by Letters Patent. j

-This invention 'consists in arranging valves and air-passages within a hollow cylinder or drum, having an oscillating movement, and provided with a chamber or chambers to receive water, mercury, or other uid, as hereinafter fully shown and described, whereby an exceedingly simple and compact 'pump or blower is obtained, one not liable to get out of repair, or'become derangedby use. In the accompanying sheet of drawings- Figure 1 is a vertical section of our invention,l taken in the line afm, fig. 2.

Figure 2, a vertical section of the same, taken in the line y-y, figs. 1 and 3.

Figure 3, a vertical section of the same, -talrenin the line v fr', iig. 2.

Figure 4, a vertical section of the same, taken in the line yly, figs. 1 and 3.

v Similar letters of reference indicate like-parts. V

A represents a hollow cylinder or drum,which is hung or suspended on tubular journals B B', andhas a smaller drum, C, placed concentrically within it, an annular space of requisite dimensions being allowed between the two drums, which is divided into two compartments a a by a partition-plate, aX, (see figs. 2 and 4.) In each yspace or compartment a a there are two partitionLplates b b, which extend down through a chamber, D, in the drum C, and form air-passages E E', said partition-plates in the spaces or compartments a being provided each with a valve F, all opening into the passages E E', as shown in igs. l and 3. The spaces or compartments a l, are made to communicate with the chamber D at certain periods in the operation of the device, by means of valves G G, opening upward. Thejournal B communicates with the drum C, and the other journal B commu,

nicates with the chamber D, (see figs. 2 and The compartments a a are cach provided with a'certain quantity of water or other liquid, designated by c, (see figs. 1 and The drum A has an oscillating motion communicated to Vit'by any proper means, and the water or other fluid, c, peri'orms the function of a piston or plunger; and when the drum moves in the directionV indicated by the red arrow, the air in a a', above the Water or other fluid, e, will be forced out through the valves F into thc passages E E', into drum C, and out through the journal B, as indicated by the arrows 1, while a suction is produced at the opposite sides of the compartments t a', and air is drawn inward, through the journal B', into chamber D, and thence into the compartments a a', through the valves G, as indicated by the arrows 2. Thus it will be seen that a very simple and eiicient vacuum-pump or blower is obtained, for the device will answer for either. A single chamber or compartment,

a or a', will operate, but two would be preferable.

We do not confine ourselves to any number of compartments.

\ Having thus described our invention, we claim as new, and desire to secure by Letters Patenti" The two drums A C,.'placed concentrically one within the other, the chamber D, air-passages E E', valves F G, and tubular journals B B', all arranged and combined to operate in connection with water or other liquid placed in the space or spaces between the two drums A C, substantially in the manner as and for the purpose specified.

. JOHN DOYLE,

TIMOTHY A. MARTIN.'

Witnesses:

WM. F. McNaManA, r` ALEX. F. ROBERTS. 

